Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2007-06-12
2007-06-12
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S189000, C333S191000
Reexamination Certificate
active
10935160
ABSTRACT:
A thin film bulk acoustic resonator includes a piezoelectric film, and a pair of electrodes between which the piezoelectric film is interposed. The piezoelectric film includes an outer region extending outwards from at least a portion of the periphery of a resonator portion composed of the pair of electrodes and the piezoelectric film. The outer region includes, in at least a portion thereof, an acoustic damping region for damping acoustic waves.
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Nakamura Hiroyuki
Nakatsuka Hiroshi
Onishi Keiji
Yamakawa Takehiko
Matsushita Electric - Industrial Co., Ltd.
Takaoka Dean
Wenderoth , Lind & Ponack, L.L.P.
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